hg: jdk/sandbox: 8208186: SetHeapSamplingInterval handles 1 explicitly

[chris.hegarty at oracle.com]

Changeset: 11ad7d302a94
Author:    jcbeyler
Date:      2018-09-05 10:17 -0700
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/11ad7d302a94

8208186: SetHeapSamplingInterval handles 1 explicitly
Summary: Explicitly test for the 0 case (sample everything)
Reviewed-by: amenkov, sspitsyn

! src/hotspot/share/runtime/threadHeapSampler.cpp